Before the SAE standard J543a the automotive, truck, and tractor world was pretty much evenly split between positive and negative ground, generally by manufacturer. In the 1930s there were arguments put out by the different factions justifying their choices.
Its kind of like which side of the road to drive on. So long as you are alone, either side gets you to your destination safely, but if you have to share it works a whole lot better if all follow the same rule.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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